Describe the process of parturition in humans.

What is the role of foetus in inducing parturition?

What stimulates pituitary to release the hormone responsible for parturition? Name the hormone.

Draw a labelled diagram of a part of the transverse section through seminiferous tubule of human testis showing the various stages of spermatogenesis.

When and where do chorionic villi appear in humans? State their function.

Study the figure given below and answer the questions that follow:
Identify ‘a’ in the figure and mention its function.

Name two hormones that can be found only in the blood of a pregnant woman. Mention the source organ/ tissue that secretes each of them.

Corpus luteum in pregnancy has a long life. However, if fertilisation does not take place it remains active only for 10 – 12 days. Why?

Write the function of each of the following:
Acrosome of human sperm.

Write the effect of the high concentration of LH on a mature Graafian follicle.